/**
* This is the irqcontrol callback to be registered to uio_info.
* It can be used to disable/enable interrupt from user space processes.
*
* @param info
* pointer to uio_info.
* @param irq_state
* state value. 1 to enable interrupt, 0 to disable interrupt.
*
* @return
* - On success, 0.
* - On failure, a negative value.
*/
static int
igbuio_pci_irqcontrol(struct uio_info *info, s32 irq_state)
{
struct rte_uio_pci_dev *udev = info->priv;
struct pci_dev *pdev = udev->pdev;
pci_cfg_access_lock(pdev);
if (udev->mode == RTE_INTR_MODE_LEGACY)
pci_intx(pdev, !!irq_state);
else if (udev->mode == RTE_INTR_MODE_MSIX) {
struct msi_desc *desc;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0))
list_for_each_entry(desc, &pdev->msi_list, list)
igbuio_msix_mask_irq(desc, irq_state);
#else
list_for_each_entry(desc, &pdev->dev.msi_list, list)
igbuio_msix_mask_irq(desc, irq_state);
#endif
}
pci_cfg_access_unlock(pdev);
return 0;
}
static void
igbuio_mask_irq(struct pci_dev *pdev, enum rte_intr_mode mode, s32 irq_state)
{
struct msi_desc *desc;
struct list_head *msi_list;
#ifdef HAVE_MSI_LIST_IN_GENERIC_DEVICE
msi_list = &pdev->dev.msi_list;
#else
msi_list = &pdev->msi_list;
#endif
if (mode == RTE_INTR_MODE_MSIX) {
list_for_each_entry(desc, msi_list, list)
igbuio_msix_mask_irq(desc, irq_state);
} else if (mode == RTE_INTR_MODE_MSI) {
list_for_each_entry(desc, msi_list, list)
igbuio_msi_mask_irq(pdev, desc, irq_state);
}
}